Covert channels through branch predictors
WebBranch Prediction Unit Properties that make covert channel possible: During execution branch predictor accumulates state BP is shared among all processes on core BP is not flushed on context switches Parallel threads in SMT share same BP Branch … WebIn this paper, we introduce a new mechanism for covert communication using the processor branch prediction unit. Specifically, we demonstrate how a trojan and a spy can manipulate the branch prediction tables in a way that creates high-capacity, robust and …
Covert channels through branch predictors
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WebJul 21, 2024 · We further investigate PHT collision mechanism in the history-based predictor as well as the branch prediction mode transitions in Intel processors. Built upon such knowledge, we implement an ultra high-speed covert channel (BranchSpectre-cc) … WebJul 20, 2012 · Covert Channel: A covert channel is a type of computer attack that allows the communication of information by transferring objects through existing information channels or networks using the structure of the existing medium to convey the data in …
WebIn this article, we classify, analyze, and comprehensively compare covert channels through processor branch predictor unit. This covert channel is possible because the branch predictor is shared by multiple applications running on the same CPU. Further-more, the contents of the branch predictor tables are not flushed on context switches. Webthe outside world via an encrypted channel. A covert channel can enable the mailer to leak the raw secrets, bypassing encryption. Covert channels that utilise OS-managed spatial resources (stor-age channels) can be eliminated completely, as was proved for the seL4 microkernel [23]. Harder to control are channels that target
WebMar 13, 2024 · We reverse engineer branch predictors in several recent x86_64 processors which allows us to uncover previously unknown exploitation techniques. Using these techniques, we construct three types of transient trojans and demonstrate their stealthiness and practicality. ... Covert channels through random number generator: … WebCiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Covert channels through shared processor resources provide secret communication between malicious pro-cesses. In this paper, we introduce a new mechanism for covert communication using the processor branch pre-diction unit. Specifically, we …
WebNov 22, 2024 · Covert channels have been an effective means for leaking confidential information across security domains and numerous studies are available on typical cov An Efficient Approach for Mitigating Covert Storage Channel Attacks in Virtual Machines by …
Webexfiltration of unintended secrets through observing speculative PHT updates (in the form of covert and side channels). We further investigate the PHT collision mechanism in the history-based predictor and the branch prediction mode transitions in Intel processors. mp 1a ユニ フローWebCovert channels through shared processor resources provide secret communication between two malicious processes: the trojan and the spy. In this article, we classify, analyze, and compare covert channels through dynamic branch prediction units in modern … mo系スライドオイルWebCiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Covert channels through shared processor resources provide secret communication between malicious processes. In this paper, we introduce a new mechanism for covert communica-tion using the processor branch prediction unit. Specifically, we demonstrate how a … mo鉄ちゃんWebSep 30, 2024 · This leaves attackers with the opportunities to perform side-channel attacks on the branch predictor. This paper focuses on the saturating counter to explore a secure and lightweight design to mitigate branch predictor side-channel attacks. ... Abu … mp 2550rc ドライバWebOct 27, 2024 · To evaluate the discovered vulnerability, we build a novel attack framework, BranchSpectre, that enables exfiltration of unintended secrets through observing speculative PHT updates (in the form of covert and side channels). We further investigate the PHT collision mechanism in the history-based predictor and the branch prediction … mp 2552 ドライバWebCovert channels through shared processor resources provide secret communication between two malicious processes: the trojan and the spy. In this article, we classify, analyze, and compare covert ch... mp 2554 jpn スキャナー送信しないWeb1.2. New abstractions for describing microarchitectural covert channels. Covert channels come in different shapes and sizes. For example, attackers can monitor how loads interact with the cache, 15 the timing of SIMD units, 20 execution pipeline port contention, 4 branch predictor state, 1 and more. To comprehensively block information leakage ... mo喪中はがき